The platform of a station 500 m long starts exactly where the last span of a bridge 1.7 km long ends.  How long will a train 400 m long and travelling at the speed of 65 km/h take to cover the distance and the far end of the platform?

144 seconds

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    1.7 Km (1700 m)            500 m

Total distance travelled = 1700 m + 500 m + 400 m = 2600 m

                          Time = \(\frac{2600}{65 × 5/18}\) = 144 seconds